1 : a personal religious teacher and spiritual guide in Hinduism
2 a : a teacher and especially intellectual guide in matters of fundamental concern
b : one who is an acknowledged leader or chief proponent c : a person with knowledge or expertise

2. leave her...
and the latter just won't happen any time and y'all said i should just leave her today? if only it were so easy! it's just so complex and she and i really do have good times mostmostmost of the time! <3
I love my guru!

The Urban Dictionary T-Shirt

Why do you read advice columns, horoscopes and whatever the fashion gurus and motivational speakers say? You don't need these gurus to govern your life or your point of view. Just be yourself. What do you see? Just be nobody but YOU.

The Urban Dictionary T-Shirt

n. a junior associate in law firm whom others have deemed as being the expert on a given subject matter or area of law simply by virtue of having performed some research on the matter or small aspect thereof, which may have also resulted in a written memo.

Usually results in the newly-minted "expert" being given more assignments on the same subject matter, with the expectation that they will be easy tasks for the guru.

Partner/Sr. Associate: "Can you handle this assignment? I heard you're the office guru on _____."